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J4 ›› 2014, Vol. 20 ›› Issue (4): 590-.

• 古生物学与古环境 • 上一篇    下一篇

浙闽地区早白垩世暗色岩系的孢粉组合与古气候特征

  

  • 出版日期:2014-12-20 发布日期:2015-01-13

Spores and Pollen Assemblages and Their Paleo-climate Implication from the Early Cretaceous Dark Mudstone in Zhejiang and Fujian Provinces

Liu Youxiang, Hu Wenxuan*, Hu Guang   

  • Online:2014-12-20 Published:2015-01-13

摘要:

通过定量分析浙闽地区三个典型剖面(浙江象山石浦、松阳枊城下湖源及福建武夷山崇安) 的暗色岩系沉积期的孢
粉化石,研究了早白垩纪浙闽地区的古气侯特征。研究表明,石浦地区孢粉中Pinuspollenites,Podocarpidites,Celtispollenites
和Ulmuspollenites 含量最多,下湖源地区孢粉以Pinuspollenites,Gleicheiniiidites,Classopollis 和Deltoidospora 为主,崇安地区
孢粉以Classopollis,Tracheid,Pinuspollenites 和Podocarpidites 为主。孢粉化石组合表明,石浦地区为亚热带潮湿气候,气候
变化较小;下湖源地区为亚热带潮湿-半潮湿气候,并出现一次变热变干事件;崇安地区为亚热带半干旱气候,但发生过
数次干旱与潮湿交替的气候波动。总体而言,早白垩纪研究区属于亚热带气候,具有潮湿、干旱交替变化、自东而西越来
越干旱的特征。

关键词: 早白垩世, 孢粉化石, 古气候, 暗色岩系, 浙闽地区

Abstract:

By quantitative analysis of spores and pollen from early Cretaceous dark mudstones from three typical sections in Zhejiang
and Fujian provinces, paleoclimate features of this area were obtained. Primary analysis of fossil spores and pollen shows that
Pinuspollenites, Podocarpidites, Celtispollenites, Ulmuspollenites are characterized in Shipu section, Pinuspollenites, Gleicheiniiidites,
Classopollis, Deltoidospora in Xiahuyuan section, Classopollis, Tracheid, Pinuspollenites, Podocarpidites in Chong'an section.
Quantitative analysis of fossil spores and pollen shows that there has been a humid subtropical climate with less climatic fluctuation in
Shipu, a humid-half humid subtropical climate with a short term of hot and dry climate in Xiahuyuan, half dry subtropical climate with
a few times of undulations between half-arid and half-humid climate in Chong'·an. In conclusion, this study infers a subtropical
paleoclimate with several undulations between half-arid and half-humid and it'·s more and more drought from east to west.

Key words: Early Cretaceous, fossil spores and pollen, paleoclimate, dark mudstone, Zhejiang and Fujian provinces